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【单选题】
关于脑脓肿的描述，错误的是（）脓肿分为三个期：急性脑炎期、脓肿壁形成期、包膜形成期。A.
其主要感染途径是鼻和乳突感染逆行进入颅内
B.
细菌侵入引起局限性脑内炎症并形成脓腔，称脑脓肿
C.
脑脓肿可分脑炎早期、脑炎晚期、脓肿形成早期和脓肿形成晚期
D.
脑脓肿应该与胶质瘤和转移癌相鉴别
E.
脓肿晚期增强扫描，脓肿壁呈均匀环状强化
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【简答题】设全集U={1，2，3，4，5，6，7，8)，集合M={3，4，5)，集．合N={1，3，6)，则集合P={2，7，8)可表示成 （ ） A．M∪N D．M∩N
【单选题】设集合U={1，2，3，4，5}，集合M={3，5}，N={1，4，5}，则M∩ =' ' （ ）
A.
{5}
B.
{3}
C.
{2，3，5}
D.
{1，3，4，5}
【单选题】When was the hammock invented and by whom?
A.
The Indians had invented the hammock long before they came to South America.
B.
The Indians had invented the hammock long before the Europeans came to South America.
C.
The Europeans invented the hammock after they made acquaintance with the Indians.
D.
The Europeans had invented the hammock before they went to South America.
【单选题】设全集U={1，2，3，4，5}，集合M={1，3，5}，集合N={3，4，5}，则集合（C U M）∩N等于（ ）
A.
{4}
B.
{2，3，4，5}
C.
{1，3，4，5}
D.
?
【单选题】—How long do you think it will be _______ we get the loan?—Perhaps two or three months.
A.
until
B.
before
C.
when
D.
that
【单选题】It’s not the whole nation rose up and drove the enemy out of their homeland.
A.
before long
B.
long before
C.
soon
D.
a long time
【单选题】Not ____ he died, he received an award for his selfless service to the old. [ ]
A.
long before
B.
before long
C.
long ago
D.
shortly before
【单选题】He said he had been to Hong Kong ____ and he would go there _____ once again. [ ]
A.
long before, before long
B.
before long, long before
C.
long ago, before long
D.
long before, long before
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